Enthalpy flashcards definitions

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  • Created by: Lauren
  • Created on: 05-04-13 12:03
Standard bond dissociation enthalpy
The enthalpy chnage when one mole of bonds of the same type in gaseous molecules if broken under standrad conditions producing gaseous fragments.
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Enthalpy change
The heat energy content of a system measured under conditions of constant pressure.
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Standard enthalpy of formation
The enthalpy change when one mole of a substance is formed from its element in their standard states under standard conditions.
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Hess's Law
When a reaction can occur by more than one route the overall enthalpy change is independent of the route taken.
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Means Bond enthalpy
When one mole of a specified type of bond is broken, avergaed over different compounds.
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Lattice dissociation enthalpy
The enthalpy change when one mole of an ionic solid is separated into its gaseous ions.
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The Lattice formation enthalpy
The enthalpy change when one mole of an ionic solid is formed from gaseous ions.
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Enthalpy of hydration
The enthalpy change when one mole of separated gaseous ions is dissolved completely in water to from one mole of aqueous ions.
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Enthalpy of solution
The enthalpy change when one mole of an ionic substance is dissolved in a volume large enough to ensure the ions are separated and do not interact with each other.
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Ionization enthalpy
The enthalpy change when cations are formed
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The first ionization enthalpy
The enthalpy change when the highest energy electrons are removed from one mole of gaseous atoms or molecules to form a mole of gaseous ions each with a single positive charge.
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The second ionization enthalpy
The enthalpy chnage when the highest energy electrons are removed from a mole of gaseous ions with single positive charges to form a mole of gaseous ions each with two positive charges.
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Electron affinity
The enthalpy change when anions are formed.
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The first electron affinity
The enthalpy change when electrons are gained by a mole of gaseous atoms or molecules to form a mole of gaseous ions each with a single negative charge.
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The second electron affinity
The enthalpy change when electrons are gained by a mole of gaseous ions with single negative charges to form a mole of gaseous ions each with two negative charges.
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Enthalpy of atomization
The enthalpy chnage when one mole of gaseous atoms is formed from an element or a compound.
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Other cards in this set

Card 2

Front

The heat energy content of a system measured under conditions of constant pressure.

Back

Enthalpy change

Card 3

Front

The enthalpy change when one mole of a substance is formed from its element in their standard states under standard conditions.

Back

Preview of the back of card 3

Card 4

Front

When a reaction can occur by more than one route the overall enthalpy change is independent of the route taken.

Back

Preview of the back of card 4

Card 5

Front

When one mole of a specified type of bond is broken, avergaed over different compounds.

Back

Preview of the back of card 5
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